package com.sky.controller.user;

import com.sky.constant.StatusConstant;
import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "C端-菜品浏览接口")
public class DishController {
    @Autowired
    private DishService dishService;

    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> list(Long categoryId) {
        //实现移动端查询指定分类菜品列表数据实现缓存

        //定义key，value结构dish_分类id
        String key = "dish_" + categoryId;
        //使用redisTemplate查询缓存key的数据，返回List<DishVO>
        List<DishVO> list = (List<DishVO>) redisTemplate.opsForValue().get(key);
        log.info("根据分类id获取redis缓存中的数据 list={}，categoryId={}",list,categoryId);
        //判断List<DishVO> 是否为null
        if (list == null || list.isEmpty()) {
            //缓存数据为null，执行数据库查询
            Dish dish = new Dish();
            dish.setCategoryId(categoryId);
            dish.setStatus(StatusConstant.ENABLE);//查询起售中的菜品

            list = dishService.listWithFlavor(dish);

            //判断是否有数据
            if (!(list == null || list.isEmpty())) {
                //有数据则写入缓存
                redisTemplate.opsForValue().set(key,list);
            }
        }
        //反之，直接返回数据
        return Result.success(list);
    }

}
